using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Sum_Seconds
{
    class Program
    {
        static void Main(string[] args)
        {
            var first = double.Parse(Console.ReadLine());
            var second = double.Parse(Console.ReadLine());
            var third = double.Parse(Console.ReadLine());
            var score = first + second + third;
            var minutes = score / 60;
            var seconds = score % 2;
            if(score <= 59)
            {
                minutes = 0;
                seconds = score;
            }
            else if(score > 60 && score < 119)
            {
                minutes = 1;
                seconds = score - 60;
            }
            else if(score > 120 && score < 179)
            {
                minutes = 2;
                seconds = score - 120;
            }
            else if ( seconds < 10)
            {
                { 0:00};
            }
        }
    }
}